Hothead's plan to take daughter roughly (6)
I believe the answer is:
madcap
'hothead's' is the definition.
('madcap' can be a synonym of 'hothead')
'plan to take daughter roughly' is the wordplay.
'plan' becomes 'map' (I've seen this before).
'to take' is an insertion indicator.
'daughter' becomes 'd'.
'roughly' becomes 'ca'.
'd'+'ca'='dca'
'map' going around 'dca' is 'MADCAP'.
(Other definitions for madcap that I've seen before include "Camp ad (anag.)" , "Rash person" , "Foolhardy" , "Harum-scarum" , "Crazy fellow" .)